Rotary slide carrier



Dec. 12, 1944. G, FAsslN 2,364,627

ROTARY SLIDE CARRIER Filed Jan, 15, 1942 Gas ra Ve F266 In @HM 4@Hm/vwd.

Patented Doc. l2, 1944 ROTARY SLIDE CARRIER Gustave Fassin, GrossePointe. Mich., lssignor to International Industries,

Inc.. Arbor.

Mich., a corporation of Michigan Application January 15, 1942, SerialNo. 426,908

'i Claims.

This invention relates to picture projection apparatus and ls moreparticularly concerned with rotary picture slide carriers for projectionapparatus.

It is a major object of my invention to provide projection apparatushaving a demountable rotatable slide carrier of novel simple andinexpensive construction which is easily and accurately fitted to theprojection apparatus to permit accurate projection and speedy changingof the picture slide to be projected.

It is a further object of my invention to provide a rotary picture slidecarrier assembly having a novel socket arrangement for attaching it to aprojector,

A further object of my invention is to provide a novel rotary slidecarrier having improved means for releasably holding slides thereon.

A further object of my invention is to provide a rotary slide carrierassembly wherein novel arrangements are provided for yieldably holdingthe rotatable slide carrier against accidental movement frompredetermined positions.

It is a further object of my invention to provide a rotary slide carrierassembly having a novel yieldable hub construction.

Further objects of the invention will presently appear as thedescription proceeds in connection with the appended claims and theannexed drawing in which:

Figure l is a side elevational view of the rotary slide carrier of theinvention mounted on a projector.

Figure 2 is an end elevation partly in section taken along the line 2 2of Figure 1 illustrating how the slide carrier socket device is ttedwith the projector lens tube support sleeve.

Figure 3 is an elevation illustrating one side of the demountable rotaryslide carrier assembly.

Figure 4 is an elevation illustrating the opposite side of the slidecarrier assembly from Figure 3, and showing the slide holderarrangements.

Figure 5 is a section taken along line 5-5 in Figure 4, illustrating thehub, socket and slide holder construction.

Figure 6 is an enlarged sectional view illustrating the manner in whichthe slide carrier disc is held against accidental rotation on thesupport socket Figure 'I is similar to Figure 6, illustrating the partsrelatively angularly displaced to show the camming action of the holdingprojections on the slide carrier disc as the disc is rotated to presenta substitute slide in the light path.

Figure 8 is an exploded view of the yieldable hub construction: and

Figure 9 is a fragmentary elevation, similar to Figure 4, illustratingthe slide carrier hub with the retaining nut removed to show thenonrotat able connection between the hub axle and the rotatable slidecarrier disc.

Referring to the drawing, the projector to which the socket of therotary slide carrier assembly of the invention is especially adaptedcomprises a base II supporting a lamp house I2 and a lens tube I2axially slidable in a supporting sleeve Il rigid with base I i.

At its rear end, adjacent lamp house I2. sleeve il is formed to anoutwardly extending circumferential formation defining a substantiallyrectangular socket member Il having a horizontal top wall I6 andparallel vertical side guide walls I1 and i8. Socket member IB isdesigned to locate and firmly support the rotary slide carrier assemblyto be described below in operative position on the projector.

Referring to Figures 3-9, my novel rotary slide carrier assemblycomprises a slide carrier plate or disc I9 rotatably supported on asocket member 2i by a special axially yieldable hub construction whichpermits selective rotation of the disc to interchange the slide in thelight path.- While slide carrier Il is preferably circular, it may be oiany selected shape without departing from the spirit of the invention.

Socket member 2| is preferably made from an integral blank of relativelystift sheet metal formedwith a rectangular picture framing window 22located equi-distantly between forwardly and inwardly bent side walls 23and 24 which form opposed guide channels spaced to embrace and snuglyinterflt with side walls I'I and I8 of the socket member Il on sleeveI4.

Above window 22, socket member 2i is formed with a rounded integralprojection 25. At its lower end, projection 25 is iianked by forwardlybent integral tabs 26 and 2l arranged at the same level and having flatunder surfaces adapted to rest on top wall I6 of socket member I5. Tabs26 and 2'I are so spaced vertically with respect to window 22 that theysupport and locate socket member 2l on the projector with window 22optically centered vertically with lens tube Il. Channels 23 and 24locate window 22 horizontally centrally in the light path, and have suchgood friction nt with socket member l5 as to insure that socket member2| is non-rotatably mounten on sleeve Il.

Above window 22. and vertically aligned with the optical center ofwindow 22. projection 23 is substantially centrally provided with arelatively small circular aperture 23 (Figure 8). A short hollow rigidcylindrical hub member 29 projects forwardly from socket member 2I andis formed at its rear end with a reduced diameter end collar 39providing an internal annular shoulder 3|. Hub 29 is rigidly andnon-rotatably secured to socket member 2i concentric with aperture .29.As shown in Figures 6-8, collar 39 extends into aperture 23 and ispreferably braced over within aperture 23 at the opposite side, althoughany equivalent securing means such as soldering, welding or the like maybe employed. An equivalent alternative construction is to make hubmember 29 integral with projection 29, although I have discovered thatthe two-part construction above described is less expensive and easierto manufacture. 1

A short shaft or spindle 32 having a cylindrical shank 33 of suchdiameter as to fit freely rotatably and slidably within collar 39extends axially through hub 29. Shaft 32 is formed with a sha1- lowenlarged cylindrical head 34 of such diameter as to ilt freely rotatablyand slidably within hub 29, and is formed beyond shank 32 with a shortreduced non-circular portion 39 shaped to non-rotatably nt within asimilarly shaped aperture in the central portion of disc I9 in theassembly.

Referring to Figure 9, reduced shaft portion 36 is preferably formed byfirst cutting down the diameter of a section of the inner end of shank33 and then cutting sectors from diametrically opposite sides of thatsection to provide parallel nat sides 33 and 31, so that the perimeterof shaft portion 35 comprises a four-sided gure having two parallelopposite side walls and two oppositely curved end walls. While thisshape is preferred, it is not essential, and shaft portion 35 maycomprise any non-rotatable connection with disc I9 suitable for purposesof the invention.

Inwardly of portion 35, shaft 32 is formed with a still further reducedsection 39 preferably of predetermined length. and terminates in a shortthreaded section 4I having slightly greater diameter than section 39.

As shown in Figures 6 and 7, the yieldable hub assembly includes acylindrical coiled compression spring 42 which surrounds shank 33 andextends between shoulder 3I and the inner surface of button 34.Non-circular shaft portion 33 extends into a correspondingly shapedcentral aperture 39 in disc I9. The length of shaft portion 35 axiallyof shaft 32 is substantially equal to the thickness of the metalsurrounding aperture 33 in disc I9. Thus radial shoulder 40 on the innerend of shank 33 is a stop shoulder limiting rearward axial displacementof shaft 32 relative to socket member 2I. Shaft sections 39 and 4Iproject forwardly beyond disc I9 opposite hub 29.

A suitable nut 43 threaded engages section 4I of shaft 32. Nut 43 may beof any desired shape but preferably is rounded as shown for sake ofappearance and to eliminate sharp corners.

Shaft section 39 is of such length and threaded section 4I has suchthreaded engagement with nut 43 that when nut 43 is turned until tightwith shaft 32, the inner hat face 44 of nut 43 is axially spaced asubstantial distance from reduced shaft portion 3l. As nut 43 is drawntight in assembling the hub, surface 44 turns ush with the adjacentsurface of disc I9, and shaft 32 is pulled outer edge of the hub.

inwardly of the hub against the compression of spring 42. When nut 43has been drawn up to its limit shaft 32 lies within hub 29 with button34 located just within the end of the hub and with its outer facesubstantially flush with the Button 34 therefore provides a closure forthe forward end of hub 29, preventing entry of dirt therein andpresenting a neat appearance.

The dimensions of the various sections of shaft 32 are such that, whennut 43 is drawn tight as above described, spring 42 is materiallycompressed, and shaft 32 has a predetermined amount of axial playrelative to socket member 2i against the compression of spring 42. Shaft32 is urged axially forwardly by spring 42 and nut face 44 serves as astop hunting forward axial movement of shaft 32 relative to disc I9.Contact of disc I9 with projection 29 limits forward displacement ofshaft 32 relative to socket member 2i.

Shaft 32 is non-rotatably secured to disc I9, and therefore rotatablysupports disc I9 on hub 29 of socket member 2|. Shaft 32 is rotatablysupported on axially spaced bearings in hub 29. at collar 33 and atbutton 34. This arrangement supports shaft 32 against angulardisplacement relative to the axis of hub 29, while permitting free axialand rotative movement of the shaft within the hub.

At opposite sides of hub 29 and in horizontal alignment with the axis ofrotation of shaft 32, socket member 2l is formed with integral teeth ordetents 43 and 41 adapted to extend within suitably shaped recesses orapertures 49 and 49 of disc I9 when disc I9 has been rotated to apredetermined position on the socket. Apertures 43 and 49 are preferablylocated on a horizontal diameter passing through the center of rotationof disc I9 within aperture 33. Detents 43 and 41 are preferably formedby striking out the material of extension 29 from the reverse sidealthough they may comprise small rivets or similar formations on thesocket, or on disc I9 as desired.

Disc I9 is preferably a thin rigid metal disc having a pair ofdiametrically opposite rectangular picture framing apertures 9i and 92of the same size equi-distantiy spaced from the axis of rotation of thedisc. `The sides of apertures Il and 62 are parallel, and the aperturesare vertically aligned during projection.

'I'he fiat sides of aperture 39 are preferably vertically disposedparallel to the vertical sides of apertures 3| and 52 and perpendicularto the diameter containing apertures 43 and 49 so that disc I9 can beproperly and accurately assem- I bled with socket member 2| and shaft-32. In the assembly spring 42 holds disc I9 seated on shaft portion 35.

With the slide carrier assembly mounted on the projector apertures 5Iand 92 may be quickly interchanged behind window 22 simply by rotatingdisc I9 through 180. Projections 49 and 41 cooperate with apertures 49and 49 to retain disc I9 against accidental rotation when a slide isbeing inserted before upper aperture 32 while lower aperture 9| is inthe path of projection, but the exertion of sufilcient force tending torotate disc I9 will cause projections 43 and 41 to cam out of thecorresponding apertures in the disc. this operation being permitted bythe above-described permissible axial play in shaft 32. Figure 'Iillustrates disc I9 in an intermediand socket together.

assess? ate position or rotation wherein shaft 32 has been displacedinwardly o! hub 28 until button M is weil within the hub, and disc i8 isseparated from the socket member a distance equal to the height of theprojections I6 and l1. Thus the permissible axial play oi' shaft 32relative to socket member 2i is at least equal to the height ofprojections IB and Il and is preferably somewhat larger. Upon reachingeither 180 position, the force oi' spring 42 is sufllcient to snap thedisc toward socket 2|, projections 48 and 41 entering into thecorresponding disc apertures so as to again releasably lock the discDisc I! is formed with diametrically opposite peripheral linger notches53 and Il adjacent aperturesil and B2 aording means for gripping thedisc I9 for rotation.

For holding slides before apertures 5| and I2 on the slide carrier disc,I provide on the opposite side of the disc from socket member 2'! a pairof elongated parallel vertical guide bars 55 and 5S which are preferablyriveted to disc I8 and flank opposite sides oi' apertures 5I and 52.Bars Biand 56 denne opposed rectangular channels Vintol which pictureslides may be inserted from the top into position before aperture 52,while a picture slide at aperture 5I is being projected.

For limiting radially inward movement of the picture slides in channels'55 and 58, and for holding the slide before lower aperture 5I fromdropping out, I provide each of channels 55 and 56 with `an elongatednarrow strip 5l of thin spring metal which has its central portionsecured atly, as by rivet 58. to disc I9. inwardly of apertures 5i and52, each strip 5l is bent at right angles away from disc I9 as far aspermit ted by the adjacent guide bar to provide subI stantiallyhorizontal stop walls 59. From each wall 59, each strip 51 extendswithin the channel toward the circumference of disc I9 and is formedwith an inwardly bowed section 6i, thereby providing a slide contactingspring within the channel at each side of disc apertures 5l and 52. I

When it is desired to use the rotary slide carrier assembly with theprojector of Figure i, socket member 2| is simply fitted overcooperating socket member l5 and allowed to drop until tabs 26 and 21contact wall I6. The carrier assembly is now correctly and operativelymounted on the projector.

A picture bearing slide is inserted into the top of the guideway formedby bars 55 and 56 until its lower edge rests on stop walls 59. Duringthis operation springs 6I at opposite sides of aperture 52 flatten moreor less according to the thickness of the slide. A picture slide is nowproperly registered before aperture 52. Disc i9 is then rotated through180 to locate aperture 52 and its associated slide in registry withWindow 22 in the light path between lamp house l2 and lens tube i3.Springs 8| are of suilicient strength to frictionally keep the slidebefore aperture 52 from dropping out during projection.

Rotation of disc I9 to bring aperture 52 into `the light pathsimultaneously brings aperture 5i up above the projector to a positionwhere the next slide to be projected can be inserted before aperture 5|.These operations are repeated as often as desired.

Although the illustrated disc i8 has provision for only two slides, anydesired number of slide apertures may be provided thereon-withoutdeparting from the invention.

Spring I2. while of sumcient power to iirmly hold disc IB non-rotatableon socket 2| during projection, permits disc I9 to be readily rotatedfor exchanging slides. Disc I9 may be rotated in either direction in theabove construction with the same result. NU novel yieldable hubconstruction automatically insures proper and positive registry of eachslide to be projected in the light path.

The invention may be embodied in other specific forms without departingfrom the spirit or essential characteristics thereof. The presentembodiment is therefore Vto be considered in all respects asillustrative and not restrictive, the scope o! the invention beingindicated by the appended claims rather than by the foregoingdescrlption, and all changes which come within the meaning and range ofequivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States LettersPatent is:

l. In comblnationwith a rotary slide carrier plate having a pair ofdiametrically opposite picture projection apertures, a pair oi parallelbars extending substantially completely across said plate and each oi'saidbars extending along a side oi both of said aperture. said barsdefining slide holding guides at opposite sides oi said apertures, and astrip of spring metal extending substantially the length ci each guide,each strip having its intermediate portion secured to said plate and itsends bowed to provide slide holding springs at opposite sides ci eachaperture.

2. In a rotary slide carrier assembly. a support having a rigid hollowhub, a shaft rotatably and slidably mounted in said hub, a spring withinthe hub surrounding said shaft, a non-circular portion on said shaftprojecting beyond said support on the side opposite said hub, a slidecarrier plate tted on said non-circular portion so as to be rotatablewith said shaft, a. threaded end section on said shaft spaced from saidnoncircular portion and a fastening element on said end section.

3. A rotary slide carrier assembly for a projector comprising a slidecarrying disk; a support member pivotally connected to said disk forrotation relative thereto; spring engaged positioning means operatingbetween said disk and said support member; said support including aslide frame having parallel gnideways engageable with a fixed portion ofa projector and permanent stops associated with said guideways andadapted to cooperate with said projector and accurately position saidslide carrier assembly thereto.

4. A slide carrier assembly as defined in claim 3, wherein said supportis provided with a window opening therethrough and said projectorengaging guideways are located one at each side of said window opening,and said slide carrying disk is provided with window openingsregistrable with the window opening in said support and provided withslide supporting channels one at each side of two opposite sides of saidwindow opening.

5. A slide carrier assembly as dei-ined in claim 3, wherein said supportmember comprises an integral member of formed sheet metal having awindow opening therethrough and parallel channels iormed one at eachside of two opposite sides o! said window opening forming saidguideways.

6. A slide carrier assembly as dened in claim 3, wherein said supportmember comprises an intesralmemberoti'ormedsheetmetalhavinsa windopenins theretbrouxh. and said guideways rise parallel channels formedone at each oi' two opposite sides o! said window openentially spaced.open-sided recesses tanins towadtheotherotsaidmembemsaidothsrmemberhaving a plurality oi detents permanently and rigidly provided thereonand projecting axins. and seid permsnent stops comprise bent g iallytoward said one member, said detentabeoverlugsattheupperendsotsaidchannelsproinzsolocated withrespecttothepivotalgm vidinx nxed positionint stops for said support.and so spaced circumferentially as to cooperate'Llnarotaryslidecarrierassemblyioraproinseatinzensasementwiththeoisaidlector. a disk member havin: a pluraiiu oi en. one member and yieldinalylock said members in cumi'erentially spaced windows: means on said l0 my011e 0! e plurality of selected adjusted reladisk member for holdingslides in registry with V9 938111 905mm with said window in maeachotseidwindowsnsupportmemberhavinga Wmndminl'esimwlthoneofthewinmaiswindow therein er a nu comparable m mw "f 1d di mmm wd detenta and rethewindows of said disk member' pivot means cess bem 8 mnd that when idmembf mounting saiddiskmemberon said'support memu e relatively muted meither Milon seid be, for have um movement mud and away detents willride out ot said recesses and @am said members apart against the actionot said from said support member, said pivat means also what mem. md onemember ham a mounting said members for rotation to bring smooth circular8mm lo said any one ot the windows in said disk member m and uw mmm, tothemmgmvom ummm. *uw "3.15m with 1 um 1d umg which ma detenta areoperable to rms when me rrnmemmrrmmmm u meme n my me: from ne me slidemember toward said support member. one adjusted ma mmm m mother of saidmembers having a plurality o! circumfern GUBTAVE FABSIN.

CERTI? ICTE 0F COREQCTION.

Passes no. 2.5615627 Decesber 12,- 19141;.

A oosravn Fasern.

lIt is hereby certifiedthatthe above nunbered patent was erroneouslyvissued to "International Industries, Inc.l of Ann Arbor, Michigan, acor-4 poration otlialiigan" as assigiee whereas said patent should have beeniss'ue'd to "Argus, Incorporated, a corporation or iiiehiganas assigneeof the mtire interest therein, as shown by the records of assigmmt Yinthis f1- page 5, second column, line 55, claim 5., atter-*"asseflnlily'I insert --rolative--g and that the said Letters Patentshould be read' with this correction therein that the same m conform tothe record of the case in the Patent Office. i

signed am sealed this zoen any lof msn.- A. n. 1915.

Leslie Frazer (seal) Acting emissionier Patents.

intesralmemberoti'ormedsheetmetalhavinsa wind openins theretbrouxh. andsaid guideways rise parallel channels formed one at each oi' twoopposite sides o! said window openentially spaced. open-sided recessestanins towadtheotherotsaidmembemsaidothsrmember having a plurality oidetents permanently and rigidly provided thereon and projecting axins.and seid permsnent stops comprise bent g ially toward said one member,said detenta beoverlugsattheupperendsotsaidchannelsproinzsolocated withrespecttothepivotalgm vidinx nxed positionint stops for said support.and so spaced circumferentially as to cooperate'Llnarotaryslidecarrierassemblyioraproinseatinzensasementwiththeoisaidlector. a disk member havin: a pluraiiu oi en. one member and yieldinalylock said members in cumi'erentially spaced windows: means on said l0 my011e 0! e plurality of selected adjusted reladisk member for holdingslides in registry with V9 938111 905mm with said window in maeachotseidwindowsnsupportmemberhavinga Wmndminl'esimwlthoneofthewinmaiswindow therein er a nu comparable m mw "f 1d di mmm wd detenta and rethewindows of said disk member' pivot means cess bem 8 mnd that when idmembf mounting saiddiskmemberon said'support memu e relatively muted meither Milon seid be, for have um movement mud and away detents willride out ot said recesses and @am said members apart against the actionot said from said support member, said pivat means also what mem. md onemember ham a mounting said members for rotation to bring smooth circular8mm lo said any one ot the windows in said disk member m and uw mmm, tothemmgmvom ummm. *uw "3.15m with 1 um 1d umg which ma detenta areoperable to rms when me rrnmemmrrmmmm u meme n my me: from ne me slidemember toward said support member. one adjusted ma mmm m mother of saidmembers having a plurality o! circumfern GUBTAVE FABSIN.

CERTI? ICTE 0F COREQCTION.

Passes no. 2.5615627 Decesber 12,- 19141;.

A oosravn Fasern.

lIt is hereby certifiedthatthe above nunbered patent was erroneouslyvissued to "International Industries, Inc.l of Ann Arbor, Michigan, acor-4 poration otlialiigan" as assigiee whereas said patent should have beeniss'ue'd to "Argus, Incorporated, a corporation or iiiehiganas assigneeof the mtire interest therein, as shown by the records of assigmmt Yinthis f1- page 5, second column, line 55, claim 5., atter-*"asseflnlily'I insert --rolative--g and that the said Letters Patentshould be read' with this correction therein that the same m conform tothe record of the case in the Patent Office. i

signed am sealed this zoen any lof msn.- A. n. 1915.

Leslie Frazer (seal) Acting emissionier Patents.

